html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #fafaf7;
  color: #1a1a18;
  font-family: "IBM Plex Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.site-header {
  margin-bottom: 64px;
}

.site-title {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: -0.01em;
}

hr {
  border: 0;
  border-top: 1px solid #d8d8d1;
  margin: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
  font-size: 15px;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.nav-separator {
  color: #8b8b84;
}

.section {
  margin-bottom: 72px;
}

.section-label {
  display: inline-block;
  padding: 4px 10px;
  background: #1a1a18;
  color: #fafaf7;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.section-body {
  margin-top: 24px;
}

.body-copy {
  font-size: 17px;
  line-height: 1.8;
  font-weight: 300;
}

.body-copy p {
  margin: 0 0 22px;
}

.body-copy p:last-child {
  margin-bottom: 0;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 24px;
}

.filter-chip,
.tag-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
}

.filter-chip {
  border: 0;
  padding: 8px 12px;
  background: #f0f0ee;
  color: #666;
  font-family: inherit;
  font-weight: 400;
  cursor: pointer;
}

.filter-chip.active {
  background: #1a1a18;
  color: #fafaf7;
}

.writing-list {
  border-top: 1px solid #d8d8d1;
}

.writing-row {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid #d8d8d1;
}

.writing-date,
.article-date {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: #999;
  font-size: 13px;
}

.writing-main {
  min-width: 0;
}

.writing-title {
  display: inline-block;
  color: #1a1a18;
  text-decoration: none;
  font-size: 18px;
  line-height: 1.5;
}

.writing-title:hover,
.writing-title:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.writing-tags,
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tag-chip {
  padding: 6px 10px;
  background: #f0f0ee;
  color: #666;
  font-weight: 400;
}

.tag-chip.muted {
  padding: 5px 9px;
  font-size: 12px;
}

.loading-message {
  margin: 18px 0 0;
  color: #666;
  font-size: 15px;
}

.article {
  margin-bottom: 72px;
}

.article-title {
  margin: 0 0 12px;
  font-size: 34px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.article hr + .article-body,
.article-body {
  margin-top: 28px;
}

.site-footer {
  color: #8b8b84;
  font-size: 13px;
}

@media (max-width: 640px) {
  .page {
    padding: 40px 20px 56px;
  }

  .site-header {
    margin-bottom: 48px;
  }

  .section {
    margin-bottom: 56px;
  }

  .writing-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .article-title {
    font-size: 30px;
  }
}